feat(fe): 隐私政策改为打开微信后台配置的《用户隐私保护指引》

settings 隐私政策入口改调 wx.openPrivacyContract；旧基础库或未配置时兜底
回内置 agreement 页。用户协议仍走内置页面。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

pets-fe/pages/settings/settings.js

@@ -40,10 +40,21 @@ Page({
   openSheet(e) {
     this.setData({ sheetType: e.currentTarget.dataset.type, sheetShow: true });
   },
-  // 用户协议 / 隐私政策
+  // 用户协议：走我们自己的页面
   goAgreement(e) {
     wx.navigateTo({ url: '/pages/agreement/agreement?type=' + e.currentTarget.dataset.type });
   },
+  // 隐私政策：直接打开微信公众平台后台配置的《用户隐私保护指引》。
+  // 旧基础库没有该接口时，兜底用内置页面
+  openPrivacy() {
+    if (wx.openPrivacyContract) {
+      wx.openPrivacyContract({
+        fail: () => wx.navigateTo({ url: '/pages/agreement/agreement?type=privacy' }),
+      });
+    } else {
+      wx.navigateTo({ url: '/pages/agreement/agreement?type=privacy' });
+    }
+  },
   // 自己的关注/粉丝。之前只有帖子上的「+关注」按钮，关注完没有任何地方能看
   goRelations(e) {
     const uid = (this.data.user && this.data.user.id) || '';

pets-fe/pages/settings/settings.wxml

@@ -15,7 +15,7 @@
 
   <view class="profile-list">
     <view class="profile-row" data-type="user" bindtap="goAgreement"><view class="pr-ic"><pt-icon name="doc" size="{{34}}"></pt-icon></view><text class="pr-label">用户协议</text><view class="pr-arrow"><pt-icon name="next" size="{{28}}"></pt-icon></view></view>
-    <view class="profile-row" data-type="privacy" bindtap="goAgreement"><view class="pr-ic"><pt-icon name="note" size="{{34}}"></pt-icon></view><text class="pr-label">隐私政策</text><view class="pr-arrow"><pt-icon name="next" size="{{28}}"></pt-icon></view></view>
+    <view class="profile-row" bindtap="openPrivacy"><view class="pr-ic"><pt-icon name="note" size="{{34}}"></pt-icon></view><text class="pr-label">隐私政策</text><view class="pr-arrow"><pt-icon name="next" size="{{28}}"></pt-icon></view></view>
   </view>
 
 </view>